2024 BMW X-Series ACSM Sensor Service Action

Why the ACSM Sensor Matters

The Active Crash Safety Module (ACSM) control unit is a critical component responsible for managing the driving safety and driving dynamics sensor system in your BMW. It plays a vital role in deploying airbags and other passive safety systems during a collision, as well as contributing to the vehicle's overall stability and handling. A malfunction in this module can severely compromise your vehicle's ability to protect occupants and maintain safe operation.

Recognizing a Faulty ACSM Sensor

Owners of affected 2024 BMW X-Series vehicles may notice several indicators if the ACSM control unit is failing. The primary symptom is the illumination of various warning displays in the instrument cluster. These warnings will inform the driver about the failure and deactivation of critical driving safety functions. Additionally, you may experience restricted driving dynamics functions, impacting the vehicle's handling and stability.

The Underlying Cause

The root cause of this issue lies within the ACSM control unit itself. During the manufacturing process, microscopic cracks may have formed on the printed circuit board inside the module. Over time, and particularly due to mechanical load experienced during normal vehicle operation, these cracks can enlarge. This expansion can eventually lead to a complete failure of the control unit, triggering the warning messages and functional limitations.

Repair Procedure Summary

BMW has initiated a Service Action Notification-Reminder 22 Jan 2026 to address this potential defect. The repair involves inspecting and, if necessary, replacing the faulty Active Crash Safety Module (ACSM) Sensor or control unit. This procedure will restore the full functionality of your vehicle's driving safety and driving dynamics systems, ensuring that all safety features operate as intended.

What Owners Should Do

If you own a 2024 BMW X3, X4, X5, or X6, and are concerned about the Active Crash Safety Module (ACSM) Sensor, it is crucial to take action. BMW is providing this repair free of charge to affected vehicle owners. You should contact an authorized BMW center at your earliest convenience to schedule an appointment. You can find your nearest dealer by visiting bmwusa.com/dealer. Do not delay this important service, as a properly functioning ACSM is essential for your safety and the safety of your passengers.

Important Warnings

BMW is committed to ensuring the safety of its vehicles. The repair for the faulty Active Crash Safety Module (ACSM) Sensor is provided at no cost to the owner. This ensures that all affected vehicles can be brought to the correct operating standard without financial burden. Please ensure you seek repair at an authorized BMW center to guarantee the work is performed correctly and covered under the service action.

Source: NHTSA Manufacturer Communication ID 11028296